I would have to install such devices in poorly ventilated and hot RACK cabinets ...
I'm not sure if your plan is going to work in these conditions. The task of fans is to move ambient air efficiently through device with focus on air flow over hot surfaces. And assumption is that ambient air is sufficiently cold at all times (the environment temperature specification is about that).
If you place a device inside a cabinet, then the environment, referred to in specs, is actually inside of your rack. And if the rack is poorly ventilated to the extent that heat dissipation doesn't allow to dissipate heat, generated inside cabinet, at reasonably low internal temperatures, then no amount of in-device ventilation will help ... Sure, you can dissipate 500W of heat even only via cabinet walls (without ventilation), but the temperature difference between inside and outside of cabinet will have to be big, meaning that in normal circumstances temperature inside the cabinet will be very high.
So you really should consider getting cabinet ventilation to acceptable levels ...
Statistics: Posted by mkx — Thu Feb 29, 2024 8:55 am